Figure a shows changes in the relative humidity of the atmosphere during the daylight hours of one

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Figure a shows changes in the relative humidity of the atmosphere during the daylight hours of one day. Figure b shows changes in the tension in the xylem of a tree during the same period.

a. Describe and explain the relationship between relative humidity and xylem tension.

b. Describe and explain the diff erences observed in xylem tension between the top of the tree and the bottom of the tree.

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Cambridge International AS And A Level Biology

ISBN: 9781107636828

4th Edition

Authors: Mary Jones, Richard Fosbery, Jennifer Gregory, Dennis Taylor

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Question Posted: Sep 01, 2021 01:48 AM

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Figure a shows changes in the relative humidity of the atmosphere during the daylight hours of one

Question:

100 -500 bottom of tree -1000 - -1500 - -2000 - top of tree -2500 + 6 8 10 12 14 16 18 8 10 12 14 16 18 Time of day/hours Time of day/hours Relative humidi ty/% Tension in xylem/kPa

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a the lower the relative humidity the lower the hydro...View the full answer

Cambridge International AS And A Level Biology

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